Quick answers
- Does Raymond Y. Chan accept Medicare assignment?
- Medicare's clinician data says Raymond Y. Chan may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Raymond Y. Chan see?
- In 2024, CMS data shows 84 Original Medicare patients and 323 services for Raymond Y. Chan. This counts Original Medicare only and measures volume, not quality.
- What is Raymond Y. Chan's NPI number?
- 1730298373. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Raymond Y. Chan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 84 |
|---|---|
| Services billed to Medicare | 323 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 83 |
Most frequent services
- Multiple measurements of eye fluid pressure over an extended time period (92100)168 services
- Removal of growth of cornea (65400)48 services
- Removal or relocation of corneal conjunctiva (65420)36 services
- Destruction of growth of retina using a laser (67210)24 services
- Removal of growth of eyelid (67840)20 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol74%
- Arthritis44%
- Diabetes35%
- Osteoporosis29%
- Chronic kidney disease26%
Practice locations
Addresses where Raymond Y. Chan is enrolled with Medicare (CMS data updated October 2, 2026).
Specialties
- Ophthalmologyprimary
Other ophthalmologists in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Miami, Lm Miller School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1730298373 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians